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Patent US4569786A successfully refreshed from Google Patents.
US4569786A
Expired / Lapsed
US
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Electrically conductive thermoplastic resin composition containing metal and carbon fibers
Assignee: Ube Corp
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Filing: 1984-04-06
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Granted: 1986-02-11
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Expires: 2004-04-06
Abstract
Abstract An electrically conductive thermoplastic resin composition having a high electrical conductivity and a relatively low specific gravity is obtained by evenly dispersing 2% by volume or more of metallic fibers and 2% by volume or more carbon fibers in a thermoplastic resin matrix, the sum of the amounts of the metallic and carbon fibers being from 8% to 20% by volume.
Inventors
- 👤 Ryuichi Deguchi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 23:23
CPC Classifications
H; H01; H01B; H01B1/00; H01B1/20; H01B1/22; C; C08; C08K; C08K7/00; C08K7/02; C08K7/04; C08K7/06; H01B1/24
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
147 words
An electrically conductive thermoplastic resin composition which comprises: a matrix comprising a thermoplastic resin consisting essentially of at least one member selected from the group consisting of polyolefins, polyamides, acrylonitrile-styrene copolymer resins, acrylonitrile-styrene-butadiene terpolymer resins, polystyrene, polycarbonates, polyacetal resins, polyacrylic ester resins, and polyesters, and a dispersed phase consisting essentially of at least 2% by volume of metallic fibers having a diameter of from 10 to 150 microns and a length of from 0.5 to 10 mm and consisting essentially of a metal selected from the group consisting of steel, stainless steel, brass, copper, aluminum, and alloys of at least two of copper, aluminum, chromium, zinc, manganese and iron, and at least 2% by volume of carbon fibers uniformly dispersed in said matrix, the sum of the amounts of said metallic fibers and said carbon fibers being in the range of from 8% to 15% by volume.
Claim 2
Dependent Claim
147 words
An electrically conductive thermoplastic resin composition which comprises: a matrix comprising a thermoplastic resin consisting essentially of at least one member selected from the group consisting of polyolefins, polyamides, acrylonitrile-styrene copolymer resins, acrylonitrile-styrene-butadiene terpolymer resins, polystyrene, polycarbonates, polyacetal resins, polyacrylic ester resins, and polyesters, and a dispersed phase consisting essentially of at least 2% by volume of metallic fibers having a diameter of from 10 to 150 microns and a length of from 0.5 to 10 mm and consisting essentially of a metal selected from the group consisting of steel, stainless steel, brass, copper, aluminum, and alloys of at least two of copper, aluminum, chromium, zinc, manganese and iron, and at least 2% by volume of carbon fibers uniformly dispersed in said matrix, the sum of the amounts of said metallic fibers and said carbon fibers being in the range of from 8% to 15% by volume.
Claim 3
Dependent Claim
28 words
The composition as claimed in claim 1, wherein said carbon fibers have a diameter of from 1 to 50 microns and a length of 0.5 to 10 mm.
Claim 4
Dependent Claim
29 words
The composition as claimed in claim 1, wherein said carbon fibers are contained in an amount of less than 10% by volume but not less than 2% by volume.
Claim 5
Dependent Claim
15 words
The composition as claimed in claim 1, wherein said thermoplastic resin consists essentially of polyamides.
References Cited (Backward Citations)
US4404125A
Cited
US4508640A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1989-02-10 | 1989-08-12 | 1990-02-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-02-10 | 1993-08-12 | 1994-02-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-02-10 | 1997-08-12 | 1998-02-11 | $7700.00 | Window Closed / Lapsed |